Notify IORap without including packages for secondary dex opt.

The current secondary dex opt doesn't distinct between
opt performed and skipped, which causes unnecessary traces
purge for IORap.

Bug:161633001
Test: manually trigger bg-dexopt via 'adb shell cmd jobscheduler run -f
android 800' and check the log.

Change-Id: Iae4fc0b6fc73707ada8895b38c3ae3f772ac2cd0